SIMPLIFIED MODEL OF THE LOWER MOTOR NEURON SYSTEM
The lower motor neuron system
is housed in the central and peripheral nervous system (97.1 [A,B]).
Figure 97.1.— Schematic representation of the lower motor neuron system [A]. The relation between relevant regions of the central nervous system and the lower motor neuron system [B]. The lower motor neuron is represented in blue. The sensory neuron is represented in dark orange. SC: spinal cord; LMN: lower motor neuron; MNJ: myoneural junction. Green squares represent myelin of Schwann cell origin. Light brown squares represent myelin of oligodendroglia origin.LOCALIZING THE SITE OF DAMAGE USING A SIMPLIFIED MODEL IN NEONATES WITH NEUROMUSCULAR HYPOTONIA
The possible site of neuromuscular dysfunction (Figure 97.2) is determined by analyzing the clinical findings and is confirmed by neurophysiological testing or imaging studies. There are 10 possible sites.